chore(deps): bump specifications/dev from 01bc83c to 29d6a9d

Bumps [specifications/dev](https://github.com/ome/ngff-spec) from `01bc83c` to `29d6a9d`.
- [Release notes](https://github.com/ome/ngff-spec/releases)
- [Commits](ome/ngff-spec@01bc83c...29d6a9d)

---
updated-dependencies:
- dependency-name: specifications/dev
  dependency-version: 29d6a9deab4ad41e74b4b76afa5780a159e746f9
  dependency-type: direct:production
...

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Author: dependabot[bot]